Composite wall construction



Filed Aug. 6, 1923 J. F. MAKOWSKI COMPOSITE WALL CONSTRUCTION Dec. 9,1924.

Patented net. 9, 1924.

UNITED, STATES PATENT OFFICE.

some I. .MAxowsKI, or s'rocx'ron, CALIFORNIA, ASSIGNOR To THE cALrronmnCEDAR rnenuc'rs COMPANY, or s'rooxron, cALrroRNIA, A CORPORATION.

' COMPOSITE WALL CONSTRUCTION.

Applicatloiiflled August 6, 1928. Serial R0. 655,859.

To aZZwlwm it may concern: Be it known that 1, Jon; F. MAKOWSKI, acitizen of the United States, residing at .Stockton, county of SanJoaquin, State of California, have invented certain new and usefulImprovements in Composite Wall Construction; and I do declare thefollowing to be a full, clear, and exact description .of the same,reference being had to the acthe buildingart and particularly tointerior and exterior wall construction- The primary object of the,invention 1s to produce a relatively inexpensive wall to which may be.applied a surfacing coat of plastic material, such'as plaster or cement,

the wall structure being such that the sur facing material'will notcrack or check when applied thereto. As: far as I am aware all plasticwall structures now commonly used are subject to-more or less crackingand checking, particularly outside walls having a cement or stuccosurfacing. My improved structure practicall eliminates this and at thesame time is o a most inexpensive type and very easily constructed.

In the drawings similar characters of reference indicate correspondingparts in the several views:

Fig. 1 is a perspective view mentary portion of my improved wall, part1broken out, and in section to show the e ements of the structurethereof.

Fig. 2 is an enlarged vertical section through the wall structure.

The base of the wall is made up of sections of plaster board 1, on thesurface of which is'a coating of water-proof adhesive of afragcomposition 2 made up preferably of mag nesite and chloride ofmagnesium mixed ta'ieceive. the plastic surfacing material 4.

with av suitable filler such as any of the lmown diatomaceous earths.

A quantity of mineral fragments 3, of irregular Size and shape, such asfine gravel or the like, is embedded in the adhesive coating 2 and formsan irregular surface to present a continuous mechanical key structure"lfn'constructmg the wall the lath board made as aboveis nailed to thestudding 5 in such sizes as is found desirable. In doing this of coursecracks 6 are formed between adjacent edges of such boards. Unless theseare covered in some way before the surfacing plastic is applied to thewall, the latter, when finished, will check or crack in conformity tothe-cracks between the boards. To overcome this, I nail or otherwisefasten woven fabric strips 7 over all the cracks 6. This fabric ispreferably a small wire netting. The protruding mineral fragments 3prevent the fabric from laying close against the wall but tend rather to'hold same out a slight distance so that when the plastic is applied itwill, when soft, flow in and.

around the-fabric strips and into the interstices between the mineralfragments and also into the cracks 6. Thus there will be a solid lockand bond across the cracks 6 which prevent checking orcracking at thosepoints. The protruding, irregular surface formed by the mineralfragments 3 is an absolute essential to the success of the fabric crossbond over the cracks. Unless the fabric is clinched firmly to the wallboard there would be no greater bond obtained by its insertion in thecombination than if it was not used at all, since it will be readilyapparent that if the cross lock or bond itself is not locked or bondedto the wall supporting,

base it can add 'no support for the plaster at the open cracks. r

The mineral fragments 3 being in themselves a natural bond for plasteror cement and a bending over the cracks 6 being provided for, the wall,when complete, forms a solid composite structure which I have found inpractice can be erected inexpensively and yet will form a strongmoisture proof wall which will not check, crack or crumble. Themagnesite coating 2 between the board land gravel 3 forms an insolublemoisture proof amination of great adhesive proper ties.

, In certain instances it mi ht be found desirable to spread the fabric%over the entire surface of the wall. Whenthis is done it will bothserveits function in preventing till) cracking of the plastic material at thejoinc Having thus described my invention What I claim as new and usefuland desire to secure by Letters Patent is:

A composite wall construction comprising 5 lath boards secured tostudding, a projecting mechanical key or bond structure arranged overthe surfaces of the lath boards a fab ric laid against'such projectedkey and over the, spaces between the lath boards, and a plastic materialspread over the whole, 10

such plastic material being flowed through and around the fabric andclinched into the projected key to securely lock the fabric to the lathboard.

In testimony whereof I aflix my signature.

' JOHN F MAKOWSKI.

